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MARIE:One-Stage Object Detection Mechanism for Real-Time Identifying of Firearms

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 279-298页

作者： Diana Abi-Nader Hassan Harb Ali Jaber Ali Mansour christophe Osswald Nour Mostafa Chamseddine Zaki Computer Science Department Faculty of SciencesLebanese UniversityBeirut146404Lebanon College of Engineering and Technology American University of the Middle EastEgaila54200Kuwait Lab-STICC CNRS UMR 6285ENSTA-BretagneBrest29200France

Security and safety remain paramount concerns for both governments and individuals *** today’s context,the frequency of crimes and terrorist attacks is alarmingly increasing,becoming increasingly intolerable to ***,there is a pressing need for swift identification of potential threats to preemptively alert law enforcement and security forces,thereby preventing potential attacks or violent *** advancements in big data analytics and deep learning have significantly enhanced the capabilities of computer vision in object detection,particularly in identifying *** paper introduces a novel automatic firearm detection surveillance system,utilizing a one-stage detection approach named MARIE(Mechanism for Realtime Identification of Firearms).MARIE incorporates the Single Shot Multibox Detector(SSD)model,which has been specifically optimized to balance the speed-accuracy trade-off critical in firearm detection *** SSD model was further refined by integrating MobileNetV2 and InceptionV2 architectures for superior feature extraction *** experimental results demonstrate that this modified SSD configuration provides highly satisfactory performance,surpassing existing methods trained on the same dataset in terms of the critical speedaccuracy *** these innovations,MARIE sets a new standard in surveillance technology,offering a robust solution to enhance public safety effectively.

关键词： Firearm and gun detection single shot multi-box detector deep learning one-stage detector MobileNet inception convolutional neural network

Redox and acetylation coordinate ABA-independent osmotic stress response

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Molecular Plant 2022年第4期15卷 583-585页

作者： christophe Belin jean-Philippe Reichheld Laboratoire Génome et Développement des Plantes UniversitéPerpignan Via Domitia66860 PerpignanFrance Laboratoire Génome et Développement des Plantes CNRS66860 PerpignanFrance

Osmotic stress caused by drought or high salt concentrations is a major threat that limits plant development and affect crop *** the context of climate change,understanding the mechanisms by which plants perceive their environment to adapt to their development is a major question.A common feature of plants being exposed to osmotic stress is the accumulation of excessive reactive oxygen species(ROS)(Martinière et al.,2019).ROS can oxidatively damage biological molecules,such as nucleic acids,proteins,and lipids,but also play important signaling *** protect from ROS-induced oxidation,living organisms have developed a large panel of enzymatic and non-enzymatic systems to remove ROS and oxidized molecules.

关键词： functions. enzymatic coordinate

Mechanical strength of soda-lime glass sandblasted by gravitation

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Friction 2015年第1期3卷 65-71页

作者： Fouad ROUMILI Saci BENBAHOUCHE jean-christophe SANGLEBOEUF Laboratoire de Mécanique de Précision Appliquée Institut d’Optique et Mécanique de PrécisionUniversitéFerhat AbbasSétif19000Algérie Institut de Physique de Rennes UMR CNRS 6251 Bât.10BCampus de Beaulieu35042 Rennes cedexFrance

Damage to a glass surface by sandblasting has a remarkable effect on its mechanical properties and *** this study,we analyze the superficial deterioration of soda-lime glass and its influence on the mechanical *** by gravitation from a fixed height causes damages by the free fall of different quantities of sand,which we performed for a selected grain size and at different angles of *** characterize the surface state,we used different roughness measures(the arithmetic mean value of the roughness Ra,the root mean square roughness Rq,and the maximum roughness Rmax)and measured the optical transmission(transmittance)at different points on the specimen surface using a *** determine the mechanical strength,we proceeded by two methods:first,by a shock ball(falling ball),and then by biaxial bending using circular *** effects of the surface damage on the optical transmission and the mechanical strength of the glass are graphically presented and discussed in this paper.

关键词： sandblasting mechanical strength roughness soda lime glass

The Séchilienne (France) Landslide:a Non-typical Progressive Failure Implying Major Risks

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Journal of Mountain Science 2011年第2期8卷 117-123页

作者： jean-Louis DURVILLE christophe BONNARD Pierre POTHERAT Conseil général de l'environnement et du développement durable Paris France Independent expert PBBG SA Lausanne Switzerland Centred'études techniques de l'équipement Lyon France

The National Road RN 91 has been threatened for about twenty-five years by a huge landslide, located 25 km south-east to the town of Grenoble (France). If several million cubic meters of rock fall down, the debris will dam the valley. Then the failure of the dam by overtopping and rapid erosion might result in a catastrophic flood and dramatic consequences for human life, environment and economy throughout the valley. The paper presents the hazard assessment based on geological and hydrological surveys, including small scale hydraulic tests, as well as the risk evaluation that has been performed. The risk management relies first upon a high level monitoring and an emergency plan; various mitigation strategies have been considered.

关键词： Landslide Progressive failure Séchilienne France

Three decades of unveiling the complex chemistry of C-nitroso species with computational chemistry

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Organic Chemistry Frontiers 2022年第1期9卷 223-264页

作者： Pauline Bianchi jean-christophe M.Monbaliu Center for Integrated Technology and Organic Synthesis MolSys Research UnitUniversity of LiègeB-4000 Liège(Sart Tilman)Belgium

C-Nitroso species are characterized by a unique nitrogen–oxygen combination located next to a carbon backbone,which confers them a unique ambiphilic and high reactivity towards nucleophilic,electrophilic but also radical *** this ambivalence can be seen as a strong asset for developing versatile synthetic aminohydroxylation and/or hydroxylamination processes mainly through nitroso Diels–Alder,nitroso ene,and nitrosoaldol reactions,it also contributes to complex optimization and rationalization arising from the many competitive pathways,that is,the occurrence of regioisomers and stereoisomers,as well as dimerization and tautomerization *** reactivity profiles are usually seen by synthetic organic chemists as major hurdles to overcome,despite the armada of analytical and purification methods available to them,and hence to achieve selective and exploitable developments of such *** rise of computational chemistry and resources has certainly changed their perspectives,since it provides a very different angle to gather insights on intrinsic properties,reactivity,and *** silico chemistry also provides a robust alternative to time and resource-consuming synthetic work and can therefore contribute to alleviate wasteful preparations by guiding the chemist toward the best combination of reagents to achieve high selectivity and *** synergistic combination of synthetic organic chemistry and computational chemistry,within the specific context of the complex chemistry of C-nitroso species,is discussed in this *** review aims at giving an overview of the molecular and chemical properties obtained through computational chemistry as an enabling support for the rationalization and optimization of reactions relying on ambiphilic C-nitroso species over the 3 last *** provides clear,concise,and illustrated guidelines for the synthetic chemist in search of inspiration through computations.

关键词： chemistry reactivity isomers

Differences in egg hatching time between cyclical and obligate parthenogenetic lineages of aphids

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Insect Science 2019年第1期26卷 135-141页

作者： Charles-Antoine Dedryver Joel Bonhomme jean-Francois Le Gallic jean-christophe Simon Unite Mixte de Recherche IGEPP 1349 INRAIAgrocampus OuestlUniversite Rennes 1Le Rheu cedexFrance

Many aphid species exhibit a variation in reproductive mode which is influenced by winter climate regimes,with cyclical parthenogenetic (CP)lines dominating in cold winter areas (because they produce cold-resistant eggs)and obligate parthenogenetic (OP) ones in mild winter regions (because of their parthenogenetic overwintering).Genetic studies on several aphid species have shown that the OP trait can be transmitted during sexual events involving the 2 types of *** genetic system could be considered as a local safeguarding mechanism for OP alleles in case severe frost would have killed all parthenogenetically overwintering ***,this strategy would only be efficient in restoring local polymorphism in breeding systems if the newly hatched OP recombinants remain competitive over their CP *** this study we compared egg hatching sequences of CP and OP F1 clones from several crosses obtained for 2 cereal aphid species,Sitobion avenae (constant 5℃,8 h of light)and Rhopalosiphum padi (winter outdoor conditions).For ***,we obtained F1 offspring from 6 crosses, involving 4 clones while in *** F1 were obtained from 11 crosses involving 14 clones. We showed that in both species proportions of OP clones were higher in the first half of the progeny relative to the second *** addition,F1 OP clones hatched in the mean about a week earlier than their CP sibs,which gives them a demographic advantage at the start of the growth *** then discussed the consequences of this fitness advantage for the maintenance and spread of the OP trait in aphid populations.

关键词： asexuality diapauses genetic variation insects overwintering strategies reproductive mode

The promises and challenges of research on plant-insect-microbe interactions

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Insect Science 2017年第6期24卷 904-909页

作者： jean-christophe Simon Arjen Biere Akiko Sugio UMR 1349 Institut de Genetique Environnement et Protection des Plantes INRA Agrocampus Ouest Universite Rennes 1 Domaine de la Motte Le Rheu Cedex France Department of Terrestrial Ecology Netherlands Institute of Ecology NIOO-KNA W Wageningen the Netherlands

Ecological interactions are of paramount importance for the functioning and health of ecosystems. Phytophagous insects are part of complex ecological networks involving abiotic factors, host plants, natural enemies, and benefi- cial organisms （McLean et al., 2016）. Insects and plants are also associated durably or transitorily with a wealth of microbes including pathogens, commensals and beneficial partners from a vast array of microbial taxa （Sugio et al., 2015）. In recent years, evidence has accumulated that microbes directly or indirectly influence plant-insect interactions at individual, population and community levels.

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A quantum cascade laser infrared spectrometer for CO_2 stable isotope analysis：Field implementation at a hydrocarbon contaminated site under bio-remediation

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Journal of Environmental Sciences 2016年第2期28卷 60-74页

作者： christophe Guimbaud Cécile Noel Michel Chartier Valéry Catoire Michaela Blessing jean christophe Gourry Claude Robert Laboratoire de Physique et de Chimie de l'Environnement et de l'Espace (LPC2E) CNRS et Universite d'Orleans (UMR 7328)45071 Orleans cedex 2 France Bureau de Recherches Geologiques et Minieres (BRGM) 45060 Orleans cedex 2 France

Real-time methods to monitor stable isotope ratios of CO_2 are needed to identify biogeochemical origins of CO_2 emissions from the soil–air interface. An isotope ratio infra-red spectrometer（IRIS） has been developed to measure CO_2 mixing ratio with δ~13C isotopic signature, in addition to mixing ratios of other greenhouse gases（CH_4, N2_O）. The original aspects of the instrument as well as its precision and accuracy for the determination of the isotopic signature δ~13C of CO_2 are discussed. A first application to biodegradation of hydrocarbons is presented, tested on a hydrocarbon contaminated site under aerobic bio-treatment. CO_2 flux measurements using closed chamber method is combined with the determination of the isotopic signature δ~13C of the CO_2 emission to propose a non-intrusive method to monitor in situ biodegradation of hydrocarbons. In the contaminated area, high CO_2 emissions have been measured with an isotopic signature δ~13C suggesting that CO_2 comes from petroleum hydrocarbon *** first field implementation shows that rapid and accurate measurement of isotopic signature of CO_2 emissions is particularly useful in assessing the contribution of contaminant degradation to the measured CO_2 efflux and is promising as a monitoring tool for aerobic bio-treatment.

关键词： Isotope ratio infrared spectrometry Isotopic signature δ^(13)C of CO_2 Biodegradation monitoring Hydrocarbons BTEX

Circulating tumor cell isolation:the assets of filtration methods with polycarbonate track-etched filters

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Chinese Journal of Cancer Research 2015年第5期27卷 479-487页

作者： Claire Dolfus Nicolas Piton Emmanuel Toure jean-christophe Sabourin Department of Pathology Rouen University Hospital Inserm U1079 Institute for Biomedical Research and InnovationUniversity of Rouen

Circulating tumor cells （CTCs） arise from primary or secondary tumors and enter the bloodstream by active or passive intravasation. Given the low number of CTCs, enrichment is necessary for detection. Filtration methods are based on selection of CTCs by size using a filter with 6.5 to 8 pm pores. After coloration, collected CTCs are evaluated according to morphological criteria. Immunophenotyping and fluorescence in situ hybridization techniques may be used. Selected CTCs can also be cultivated in vitro to provide more material. Analysis of genomic mutations is difficult because it requires adapted techniques due to limited DNA materials. Filtration-selected CTCs have shown prognostic value in many studies but multicentric validating trials are mandatory to strengthen this assessment. Other clinical applications are promising such as follow-up, therapy response prediction and diagnosis. Microfluidic emerging systems could optimize filtration-selected CTCs by increasing selection accuracy.

关键词： Circulating tumor ceils (CTCs) biological markers filtration